Question
How to permanently change DNS nameservers in Ubuntu 18.04.3? Wiki article is not working.
- Posted on November 23, 2019
- Ubuntu 18.04DNS
Asked by Aerience
Hello,
I am trying to permanently change the DNS nameserver being using on my droplet.
I following this article: https://www.digitalocean.com/community/questions/how-do-i-switch-my-dns-resolvers-away-from-google
But the permanent fix option is not working.
The file “/etc/network/interfaces.d/50-cloud-init.cfg” does not exist. And when I add nameservers to the file “/etc/network/interfaces” and restart the droplet, no change occurs. The file is saved, but the DNS server being used are still the default ones.
My “/etc/network/interfaces” file looks like the following:
auto lo
iface lo inet loopback
source /etc/network/interfaces.d/*
dns-nameservers 208.67.222.222 208.67.220.220
Am I missing something? I am new to Linux.
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Hello,
With the older Ubuntu distributions, you could do that with the
/etc/resolv.confhowever, with Ubuntu 18.04 you should make the change in the netplan configs at/etc/netplan/*.yamlfiles.The file would look something like this:
To change your
nameservers, just update the addresses under thenameserverssection. And then run:Hope that this helps! Regards, Bobby
Just to point out for servers:
For persistence through reboots, you must create a file to stop cloudinit from resetting 50-cloud-init.yaml… (tested on ubuntu 20 server on DO today)
Copied from the default /etc/netplan/50-cloud-init.yaml : This file is generated from information provided by the datasource. Changes to it will not persist across an instance reboot. To disable cloud-init’s network configuration capabilities, write a file /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following: network: {config: disabled}
*** Info: The actual addresses will be nameservers rather than redirects to resolvconf, so no 8.8.8.8 etc in the yaml file.